I've been using one since about three or four years now with no problems at all - except for one site I was signing up to (I completely forget which) that didn'

I've been using one since about three or four years now with no problems at all - except for one site I was signing up to (I completely forget which) that didn't accept the email. But this was a number of years ago and I have never had a problem since. Also, no one has ever told me they never got my email due to spam filters (as of yet).